Reamer-head.



c. GLCASHMAN.

BEAMER HEAU, APPLiCATSON FILED JANQZ, 1914.

L,168,16 X i Pmnid Jan.11,1916.

@zwi/Miramas .lapicaton Tried January 53, 19M.

To aZZ 'whom it may concern.'

3e it known that l, CLARENCE G. Casn- MAN, a citizen ot the United States, residing at Waynesboro, Franklin county, and State et lennsylvania, bave invented and discovered certain new and useful improvements in Beamer-Heads, of which tbe fol ,lowing is specification.

lily said invention consists in certain inrproveinents ln tlie construction and arrangement of parts of a reanier head of the type wherein tbe reaining blades be nieve-1l radially regulate the size or adapt the lrentner for Work of dinger-ent diameters, all as will be `nereinatter more :tally described and claimed.

Referring to the accompanying; .n which is made a part hereof. and on similar reference characters indicate similar parts, Figure l is side elevation of reamer bead constructed in accordance *with my said invention. 2 an end elevation thereof, Fig'. 3 a longitudinal vertical sec- 'tion through the same, Fig. e a cross section as seen from tbe dotted line 1 /l in 3, Fig. a detail perspective ot one ot tbe real/ner blades, Fig. 6 a detail perspective or the operating' screw, Fie. 7 an end elevation of a modified form, Fig. 8 a perspective view of a modified Jorin of reamer blade, Fig. 9 a detail section showing: a modification 1n a detail, and Fig. l0 a detail section of a for ther modiiied Jforni.

ln said drawings tlie portions marked A represent the body of theA reame-r bead. B the reamer blades, and C t-lieoperating?,q screw.

The body fi is a liollov.v steel head 5oz-ined with a socket o adapted to'be 'secured to the arbor of the machine. in Figs. Il and 3 l have illustrated a preferred means for tliis purpose wherein the machine arbor 2O is formed with a shoulder 2l, the smaller portion 2Q beyond said shoulder being adapted to enter and lit in said socket o. Said portion Q2 is formed with a circumferential groove which is engaged by a ball 24 held in place by a screv.v in a radial perforation in body A. e. pin 2li tast in the arbor 20 engages notches 27 in tbe. end of body A to secure driving4 engagement. Vbile l regard this as a desirable means for mounting the reamer on the arbor, it will be andere stood that it may be done in any approved or well known manner. lie body A is Specification of Letters atant.

atente-d dan. lll, Zigi@ Serial o. Slle.

formed at its front end Wim nat faces or sides l0 around its periphery, each face being tangential to its circumference. Said Jraces correspond in number to the number of rer-.nier blaf ln the construction shown are sin blades and siX transverse faces eacli extending tangentially S3 l do eacli of siiovxn most. deeper near The reanier blades are of a form best shown in l? 3 and 5 and are adapted to slots. The backs of said blades rest against tbe backs of the respec- 'ive slots which extend to tbe periphery of t-iie body t to tbe blade to provide for clearance in opera.-

tion and allow for its adjustment to different radial positions. Each blade is formed with a notch l?, near its front end for engagement with the retaining member.

The operating screw C is mounted in a central screw-threaded perforation in tbe body A, its inner end being split and (in the principal construction) adapted to expand to form a tilijbt ft and guard against accidental A lts front end is formed with a bead c between which and a collar 13 is mounted a wheel 1l having radial projections 15 adapted to engage with the notches 12 in the respective blades. The projections l5 correspond in number with the number of the blades. The outzr end ot' body A is formed ivitli an enlarged recess in which collar 13 on screw (l may slide as the screw is adjusted. lfllieel corresponds in dianieter to tlie diameter ol' the end ot' said body and'tlie diameter ot' head c is slightly less than tbc diameter ot' the wheel l-l. In assembling` these parts the wheel ll is placed upon the screw C back of the licad and then collar 13 is screwed, or otherwise adjusted, on the shan" thereof until it inipinges against said i eel il so that said Wheel will it in s ,ts il, their inner edges being' tz o' red to correspond with the taper ot the `ne 'cody bein; cut away in front below the operating or cutting' edge of' be held from easy turning. It is ii-ecured in this vposition by a pin 16 which. extends through a hole in the shank of the crew and said collar. While wheel 14 is fus `held thus retained from radial displacement and f held rigidlyin said grooves throughout their entire lengths while in operation.

In Fig. 7 I have shown a modification in which the blades are'formed with segmental ,ribs 18 which engagewith correspondingly shaped grooves in the back of the grooves 11 by which the same pobject is accomplished. It will be understood that these or any form of inter-engaging formation between the blades and the body Whereby'said blades are allowed to slide in thei` grooves may be employed. Whichever form of blade is used the inter-engaging' formations between the blades and the body are parallel with the bottoms of the'grooves in said body, so that Said lblades have a firm rest on the bottoms of said 'grooves throughout substantially their entire lengths and are also held from radial displacement by the inter-engaging formation which also extends substantially throughout their entire length.

In Fig. 9 I have shown a' means for spreading the inner split end of screw C consisting of a screw 30, .in a central screwthreaded perforation in screw C, on the end of which is rigidly secured a conical collar 31 adapted to fit in a correspondingly .formed recess in said split end. By backing said screw 30 the ,inner end of screw C will be Spread, as will'be-readily seen. In the form shown in Fig. 10 the end of screw 30 is pointed, and the recess in'screw C also cori re'spondingly formed. This being a mere reversal of form it will be seen that screw C will be spread at its inner end when screw is forced inward.

These and other modifications in details of construction will readily suggest themselvesl as within the scope of my invention, as defined in the appended claims.y

Indicator marks as S-L- are preferably formed on head c of screw C which with a mark o on an adjacent; partof the face of the end of body A may be used to indicate' adjustments. 05 Having thus fully described my said infrom turning easily it may. never'feless .be A turned by applying a little force so as to 'A formed with Vention, what ,l claim as new desrejto secure by Letters Patent is:

1. A reamer comprising at predetermined distances a'round its pea body lformed;- with longitudinal radial grooves arrangedl riphery, reamer blades mounted. ink said grooves, a screw for sliding said reamer blades longitudinally mounted in a screwthreaded perforation in said body, and ro- 2. A 'reamer head comprising a body' formed with longitudinal grooves 's aced about its periphery'and having tapere bottoms, reamer knives mounted in said grooves formed with correspondingly tapere inner 'edges resting on the bottoms of said grooves, a screw mounted in said body, a part mounted to turn thereon and move .therewith which engages'said reamer knives to move them longitudinally,l whereby said reamer head may be expanded and contracted, substantially as set forth.

a. body 3. A reamerl head comprising cries of flat tan ntial Vsurfaces at itsopiirative end of equa width and with a longitudinal slot at the inner edge of each of said surfaces formed with a tapered bottom, reamer knives-A formed .with corresaid slots to rest on said bottom, 'a screw mounted in said head, and awheel mounted on said screw and formed -with projections adapted to engage notches in said reamer knives, substantially as set-forth.

4. A reamer head comprising a bod formed with longitudinal grooves spa spondingly tapered inner-edges mounted in f apart around its periphery, pins mounted i in longitudinal perforations alongside thlo back faces of said grooves and cutting into said grooves for lessv than half their circum I' .4 ference, reamer blades'formed with Ion v tudi'nal segmental grooves in their si es adapted to be mounted in said grooves lin sisting of the portions of said pins .project the head and engage to -slide on the'ribs conf' ing into ythe grooves, a screw `Ir1e`11nted-'finj i.. thebody, and a connection between' said.;-

screw and the blades whereby they may'jbe forth. -Y

faces around 'its yperipher alongitudinal irs( 'adjusted longitudinally, substantially'as 5. VA reamer head comprising a body w formed with a series of fiat tangential "'surgroove at the inner edge o each of saidsurfaces, reamer blades mounted 'in said grooves and secured from radial displacement by in ter-engaging ribs and grooves one inthe headand the other in the blade, a screw mounted in said body, and a rotatable part onsaid' screw formed with projections ada ted to engage said blades, whereby said bla es may be moved with said screw, substantially as y lao` Set forth.

6.1%. reamer head comprising a body Vformed with longitudinal radial grooves arranged at predetermined distances around its periphery, reamer blades mounted to slide in said grooves, a screw mounted in a screw-threaded perforation in said body, and formed to be expanded Aat its inner end, and at its outer end carrying means inter-engaging with the cutters for adjusting them longitudinally, substantially as set forth.

reamer head comprising a body formed with longitudinal radial grooves spaced about its periphery and formed .with tapered bottoms, reamer blades mounted in said grooves with tapered inner edges rest` ing on said bottoms, said grooves and blades being formed with inter-engaging parts parallel with the bottoms of said grooves, a screw mounted in a central screw-threaded perforation in said body, an'd formed with an expansible inner end, and means on the outer end of said screw engagingjvith said blades for adjusting them longitudinally, substantially as set forth.

8. A reamer head comprising a body formed with longitudinal radial grooves spaced about its periphery, reamer blades mounted in said grooves,

said grooves and blades being provided `with inter-engaging formations extending on an angle to the axis of the head, a 'screw mountedA in a screwthreaded perforation in said head, and a part mounted on the outer end of said screw with projections adapted to engage notches in said blades, substantially as set forth. 'N

9. A reamer head comprising a body formed with longitudinal radial gro'yes spaced about its periphery and formed with tapered bottoms, reamer blades formed with tapered' inner edges mounted in said grooves' to slide on said bottoms, meansfor holding said blades from radialk displacement, a screw mounted in a sc'rewethreaded parterai tion in said headand formed with an` erz pansible inner end, and meansV mountedon the outer end of said screw for, engaging said blades for sliding them longitudinally, substantially as set forth.

In Witness 'whereof I have hereunto set' my hand and seal at Waynesboro, Pennsylvania, this QOthday of December, A. D. nineteen hundred andthirteeni v CLARENCE GS CASHMAN. W'itnesses:

W. Orio Comms, ALF. N. RUSSELL. 

